Heat sink or similar apparatus



FIG. 1 is a perspective view of a heat sink or similar apparatus showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a side elevational view of the opposite side thereof;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a top plan view of the heat sink or similar apparatus of my invention. 

The ornamental design for a heat sink or similar apparatus, substantially as shown. 